531116624 has 20 divisors (see below), whose sum is σ = 1054138260. Its totient is φ = 259080960.

The previous prime is 531116623. The next prime is 531116627. The reversal of 531116624 is 426611135.

531116624 = T₂₈₇₇ + T₂₈₇₈ + ... + T₂₉₉₉.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 93470224 + 437646400 = 9668^2 + 20920^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531116623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404159 + ... + 405470.

It is an arithmetic number, because the mean of its divisors is an integer number (52706913).

Almost surely, 2^531116624 is an apocalyptic number.

It is an amenable number.

531116624 is a deficient number, since it is larger than the sum of its proper divisors (523021636).

531116624 is a wasteful number, since it uses less digits than its factorization.

531116624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809678 (or 809672 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 531116624 is about 23045.9676299347. The cubic root of 531116624 is about 809.8351663776.

Adding to 531116624 its reverse (426611135), we get a palindrome (957727759).

The spelling of 531116624 in words is "five hundred thirty-one million, one hundred sixteen thousand, six hundred twenty-four".